#!/bin/sh
#
# Copyright (c) 2007-2014 Hajimu UMEMOTO <ume@mahoroba.org>
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.

PREFIX=%%PREFIX%%
DATADIR=%%DATADIR%%

MPD_NAME=mpd5
CONFDIR="${PREFIX}/etc/${MPD_NAME}"

mv_if_exists()
{
	file="$1"

	if [ -f ${file} ]; then
		mv ${file} ${file}.bak
	fi
}

: ${DIALOG_OK=0}

tempfile=$(mktemp -t ipv6pd)
dialog --title "L2TP-IPv6PD Setup" --clear \
       --mixedform "Please input L2TP-IPv6PD account information." 11 76 0 \
       "User ID:"				1 1 "" 1 36 64 0 0 \
       "Passwd:"				2 1 "" 2 36 64 0 0 \
       "L2TP-IPv6PD Server (Fixed Prefix):"	3 1 "" 3 36 64 0 0 \
       "Prefix Delegation Interface:"		4 1 "" 4 36 64 0 0 \
       2> ${tempfile}
retval=$?
case ${retval} in
${DIALOG_OK})
	OIFS="${IFS}"
	IFS=
	exec < ${tempfile}
	read ppp_id
	read ppp_passwd
	read fixed_server
	read pd_interface
	rm ${tempfile}
	IFS="${OIFS}"

	dialog --clear --title "L2TP-IPv6PD Setup" \
	       --yesno "\
User ID: ${ppp_id}
Passwd: ${ppp_passwd}
L2TP-IPv6PD Server: ${fixed_server}
Prefix Delegation Interface: ${pd_interface}

Is it okay to proceed?" 10 76
	retval=$?
	case ${retval} in
	$DIALOG_OK)
		break
		;;
	*)
		exit
		;;
	esac
	;;
*)
	rm ${tempfile}
	exit
	;;
esac

tempdir=$(mktemp -d -t ipv6pd)
for infile in ${DATADIR}/*.in; do
	outfile=${tempdir}/$(basename ${infile} .in)
	sed -e "s|%%PPP_ID%%|${ppp_id}|g" \
	    -e "s|%%PPP_PASSWD%%|${ppp_passwd}|g" \
	    -e "s|%%FIXED_SERVER%%|${fixed_server}|g" \
	    -e "s|%%PD_INTERFACE%%|${pd_interface}|g" \
	    -e "s|%%CONFDIR%%|${CONFDIR}|g" \
	    -e "s|%%_PREFIX_%%|${PREFIX}|g" \
		< ${infile} > ${outfile}
done

CONF_FILES="dhcp6c.conf.in mpd.conf rtadvd.conf"
SCRIPT_FILES="dhcp6c_pd.sh linkdown.sh linkup.sh"
SECRET_FILES="mpd.secret"

mkdir -p ${CONFDIR}
for f in ${CONF_FILES}; do
	mv_if_exists ${CONFDIR}/${f}
	install -m 444 ${tempdir}/${f} ${CONFDIR}/${f}
done
for f in ${SCRIPT_FILES}; do
	mv_if_exists ${CONFDIR}/${f}
	install -m 555 ${tempdir}/${f} ${CONFDIR}/${f}
done
for f in ${SECRET_FILES}; do
	mv_if_exists ${CONFDIR}/${f}
	install -m 400 ${tempdir}/${f} ${CONFDIR}/${f}
done
mkdir -p /etc/rc.conf.d
mv_if_exists /etc/rc.conf.d/${MPD_NAME}
install -m 444 ${tempdir}/mpd /etc/rc.conf.d/${MPD_NAME}
rm -rf ${tempdir}